init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Parameters/DsaPublicKeyParameters.cs

@@ -0,0 +1,57 @@
+using System;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Crypto.Parameters;
+
+public class DsaPublicKeyParameters : DsaKeyParameters
+{
+	private readonly BigInteger y;
+
+	public BigInteger Y => y;
+
+	private static BigInteger Validate(BigInteger y, DsaParameters parameters)
+	{
+		if (parameters != null && (y.CompareTo(BigInteger.Two) < 0 || y.CompareTo(parameters.P.Subtract(BigInteger.Two)) > 0 || !y.ModPow(parameters.Q, parameters.P).Equals(BigInteger.One)))
+		{
+			throw new ArgumentException("y value does not appear to be in correct group");
+		}
+		return y;
+	}
+
+	public DsaPublicKeyParameters(BigInteger y, DsaParameters parameters)
+		: base(isPrivate: false, parameters)
+	{
+		if (y == null)
+		{
+			throw new ArgumentNullException("y");
+		}
+		this.y = Validate(y, parameters);
+	}
+
+	public override bool Equals(object obj)
+	{
+		if (obj == this)
+		{
+			return true;
+		}
+		if (!(obj is DsaPublicKeyParameters other))
+		{
+			return false;
+		}
+		return Equals(other);
+	}
+
+	protected bool Equals(DsaPublicKeyParameters other)
+	{
+		if (y.Equals(other.y))
+		{
+			return Equals((DsaKeyParameters)other);
+		}
+		return false;
+	}
+
+	public override int GetHashCode()
+	{
+		return y.GetHashCode() ^ base.GetHashCode();
+	}
+}